Dupla CO2 Permanent Visual Test
The Dupla CO2 endurance test is suitable for displaying the optimal CO2 content in freshwater aquariums up to 500 litres.
With the Dupla CO2 endurance test made of polystyrene, you keep full control over your CO2 content in the aquarium thanks to the colour scale. The endurance test is supplied with an indicator reagent and is very easy to install thanks to the enclosed detailed description. The corresponding discolouration of the indicator reagent shows the CO2 content in the aquarium water, which you can read off on the enclosed colour scale.
Aquarium Universe recommends:
With the Dupla CO2 Permanent test, you keep full control over the CO2 content in the aquarium water!